A convenient imino aldol reaction in ethyl alcohol catalyzed by a cation-exchange resin
作者:Makoto Shimizu、Susumu Itohara、Emi Hase
DOI:10.1039/b106662e
日期:2001.11.7
Imino aldol reaction of ketene silyl acetals with imines proceeds smoothly to give beta-amino esters in good yields under the influence of a cation-exchange resin in ethanol, and the work-up of the reaction consists only of a simple filtration followed by concentration of the crude mixture and purification.
Highly Diastereoselective Addition Reaction of Ketene Silyl Acetals to Imines Catalyzed by Samarium(III) Iodide
作者:Ryuuichirou Hayakawa、Makoto Shimizu
DOI:10.1246/cl.1999.591
日期:1999.7
In the presence of a catalytic amount of a samarium(III) iodide, the addition reaction of ketene silyl acetal to imine afforded the corresponding β-aminoester with high anti-selectivity. The reaction of chiral imine under the same conditions gave β-aminoester with high diastereoselectivity.